Security key
01749D105
ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK (ALGM)
CUSIP: 01749D105
Q1 2026 13F Holders as of 31 Mar 2026
- Type / Class
- Equity / COMMON STOCK
- Shares outstanding
- 185,278,416
- Total 13F shares
- 138,311,775
- Share change
- +1,841,045
- Total reported value
- $4,322,145,241
- Put/Call ratio
- 83%
- Price per share
- $31.53
- Number of holders
- 315
- Value change
- +$79,934,823
- Number of buys
- 184
- Number of sells
- 121
Report period
Q1 2026
Institutions
315
Top holders
10
ALGM full security history
Previous quarter: Q4 2025
ALLEGRO MICROSYSTEMS, INC. SEC filings
ALLEGRO MICROSYSTEMS, INC. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 01749D105
Recent filing periods:
Top shareholders of ALGM - ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| FMR LLC |
13D/G
13F
|
Company |
15%
|
27,421,206
|
$1,043,102,661 | +$143,998,860 | 31 Mar 2026 | |
| Capital Research Global Investors |
13D/G
13F
|
Company |
7.1%
|
13,111,292
|
$410,252,327 | -$87,395,004 | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13F
13D/G
|
Company |
4.8%
from 13D/G
|
7,347,422
|
$193,825,019 | — | 31 Dec 2025 | |
| Yoshihiro Suzuki |
3/4/5
|
Director |
0.12%
|
213,560
|
$7,850,465 | — | 07 Aug 2025 | |
| Joseph R. Martin |
3/4/5
|
Director |
0.02%
|
35,179
|
$1,293,180 | — | 07 Aug 2025 | |
| Richard R. Lury |
3/4/5
|
Director |
0.01%
|
18,857
|
$599,848 | -$506,104 | 12 Aug 2025 | |
| Mary G. Puma |
3/4/5
|
Director |
0.01%
|
17,483
|
$642,675 | — | 07 Aug 2025 | |
| Jennie M. Raubacher |
3/4/5
|
Director |
0.01%
|
14,976
|
$550,517 | — | 07 Aug 2025 | |
| Krishna G. Palepu |
3/4/5
|
Director |
0.01%
|
10,511
|
$386,384 | — | 07 Aug 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
7.7%
|
14,202,528
|
$374,662,689 | — | 31 Dec 2025 | |
| BlackRock, Inc. |
13F
|
Company |
6.6%
|
12,201,457
|
$321,874,446 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
4.1%
|
7,651,051
|
$201,834,725 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
2.9%
|
5,359,488
|
$141,383,293 | — | 31 Dec 2025 | |
| Clearbridge Investments, LLC |
13F
|
Company |
1.6%
|
2,916,785
|
$76,944,799 | — | 31 Dec 2025 | |
| ADAGE CAPITAL PARTNERS GP, L.L.C. |
13F
|
Company |
1.5%
|
2,803,944
|
$73,968,043 | — | 31 Dec 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
1.4%
|
2,560,520
|
$67,546,518 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.3%
|
2,393,968
|
$63,165,468 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
1.2%
|
2,233,136
|
$58,910,171 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
1.2%
|
2,140,147
|
$56,461,794 | — | 31 Dec 2025 | |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. |
13F
|
Company |
1.1%
|
2,036,212
|
$53,715,000 | — | 31 Dec 2025 | |
| Analog Century Management LP |
13F
|
Company |
1%
|
1,890,072
|
$49,860,099 | — | 31 Dec 2025 | |
| PRINCIPAL FINANCIAL GROUP INC |
13F
|
Company |
0.94%
|
1,742,296
|
$45,961,768 | — | 31 Dec 2025 | |
| NORGES BANK |
13F
|
Company |
0.79%
|
1,457,805
|
$38,456,896 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.74%
|
1,362,418
|
$35,940,587 | — | 31 Dec 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
0.72%
|
1,341,739
|
$35,395,075 | — | 31 Dec 2025 | |
| SEGALL BRYANT & HAMILL, LLC |
13F
|
Company |
0.67%
|
1,248,310
|
$32,930,418 | — | 31 Dec 2025 | |
| ALLIANCEBERNSTEIN L.P. |
13F
|
Company |
0.62%
|
1,148,652
|
$30,301,440 | — | 31 Dec 2025 | |
| Point72 Asset Management, L.P. |
13F
|
Company |
0.6%
|
1,119,265
|
$29,526,211 | — | 31 Dec 2025 | |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
|
Company |
0.6%
|
1,106,337
|
$29,185,170 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.55%
|
1,014,999
|
$26,775,673 | — | 31 Dec 2025 | |
| VOYA INVESTMENT MANAGEMENT LLC |
13F
|
Company |
0.51%
|
940,358
|
$24,806,644 | — | 31 Dec 2025 | |
| RAYMOND JAMES FINANCIAL INC |
13F
|
Company |
0.49%
|
908,441
|
$23,964,672 | — | 31 Dec 2025 | |
| LOOMIS SAYLES & CO L P |
13F
|
Company |
0.45%
|
829,239
|
$21,875,325 | — | 31 Dec 2025 | |
| BALYASNY ASSET MANAGEMENT L.P. |
13F
|
Company |
0.44%
|
810,460
|
$21,379,935 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.43%
|
796,329
|
$21,007,159 | — | 31 Dec 2025 | |
| Schonfeld Strategic Advisors LLC |
13F
|
Company |
0.41%
|
754,824
|
$19,912,255 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.41%
|
750,586
|
$19,800,456 | — | 31 Dec 2025 | |
| MARSHALL WACE, LLP |
13F
|
Company |
0.39%
|
714,579
|
$18,850,595 | — | 31 Dec 2025 | |
| SILVERCREST ASSET MANAGEMENT GROUP LLC |
13F
|
Company |
0.36%
|
675,703
|
$17,825,066 | — | 31 Dec 2025 | |
| GW&K Investment Management, LLC |
13F
|
Company |
0.36%
|
669,146
|
$17,652,000 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.31%
|
576,655
|
$15,212,159 | — | 31 Dec 2025 | |
| Talos Eurisko Asset Management LP |
13F
|
Company |
0.3%
|
560,200
|
$14,778,076 | — | 31 Dec 2025 | |
| FRONTIER CAPITAL MANAGEMENT CO LLC |
13F
|
Company |
0.28%
|
524,931
|
$13,847,680 | — | 31 Dec 2025 | |
| S SQUARED TECHNOLOGY, LLC |
13F
|
Company |
0.25%
|
457,451
|
$12,067,557 | — | 31 Dec 2025 | |
| FIRST TRUST ADVISORS LP |
13F
|
Company |
0.24%
|
448,980
|
$11,844,092 | — | 31 Dec 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
0.24%
|
436,200
|
$11,506,956 | — | 31 Dec 2025 | |
| Engineers Gate Manager LP |
13F
|
Company |
0.23%
|
419,600
|
$11,069,048 | — | 31 Dec 2025 | |
| Alyeska Investment Group, L.P. |
13F
|
Company |
0.22%
|
400,000
|
$10,552,000 | — | 31 Dec 2025 | |
| Man Group plc |
13F
|
Company |
0.21%
|
387,105
|
$10,211,830 | — | 31 Dec 2025 | |
| AMERIPRISE FINANCIAL INC |
13F
|
Company |
0.2%
|
373,490
|
$9,852,666 | — | 31 Dec 2025 |
Institutional Holders of ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK (ALGM) as of Q1 2026
As of 31 Mar 2026,
ALLEGRO MICROSYSTEMS, INC. - COMMON STOCK (ALGM) was held by
315 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
138,311,775 shares.
The largest 10 holders included
FMR LLC, BlackRock, Inc., Capital Research Global Investors, Invesco Ltd., JPMORGAN CHASE & CO, VANGUARD PORTFOLIO MANAGEMENT LLC, VANGUARD CAPITAL MANAGEMENT LLC, STATE STREET CORP, Clearbridge Investments, LLC, and GEODE CAPITAL MANAGEMENT, LLC.
This page lists
315
institutional shareholders reporting positions in this security
for the Q1 2026 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
294
Q1 2026 holders
315
Holder diff
21
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 Value $ | Q1 2026 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.